flot/flot — pull request #24 by ichthyos (2011-10-26 15:19:45+00:00)
Title: Throw IE- and Safari-friendly error upon finding invalid dimensions.

As [Nicholas Zakas explains](http://www.nczonline.net/blog/2009/03/10/the-art-of-throwing-javascript-errors-part-2/), old versions of IE and Safari show less-than-meaningful messages ("Exception thrown and not caught on line X") when strings are thrown instead of instances of the Error object. This commit addresses this issue.